Knowing how much you can borrow is the key to working out what you can afford to buy. For first-time buyers, the figure depends on more than just your salary. This guide explains how much a first-time buyer can borrow, covering income multiples, affordability, and the factors that increase or reduce what lenders will offer.
Income multiples explained
Lenders usually start by applying an income multiple to your annual income. The typical range is around 4 to 4.5 times your income, so someone earning £40,000 might borrow roughly £160,000 to £180,000. Some lenders offer higher multiples, up to 5.5 times income, for first-time buyers who meet certain conditions, such as earning above a threshold. So your income is the starting point for how much you can borrow.
Joint applications
If you buy with someone else, lenders consider your combined income, which can significantly increase how much you can borrow. Two people each earning £30,000 have a combined income of £60,000, so at 4.5 times income they might borrow around £270,000. Buying with a partner, friend or family member is a common way for first-time buyers to afford a home, though everyone named on the mortgage is jointly responsible for the repayments.
Affordability assessments
Beyond income multiples, lenders carry out an affordability assessment, looking at your income against your outgoings to check you can comfortably afford the repayments. They consider regular spending, debts, credit commitments, childcare and other costs. Two people on the same salary can be offered different amounts if one has higher outgoings or existing debt. So reducing your commitments before applying can improve how much you can borrow.
Stress testing
Lenders also stress test your mortgage, checking that you could still afford the repayments if interest rates rose. This is to protect both you and the lender from a situation where a rate rise makes the mortgage unaffordable. It means the amount you are offered allows some headroom for higher rates. Understanding this helps explain why a lender might offer less than a simple income multiple would suggest, especially in a higher-rate environment.
What affects how much you can borrow
Several factors influence the figure: your income and its reliability, your outgoings and debts, your credit history, the size of your deposit, the mortgage term, and the lender's own rules. A larger deposit, a clean credit record, lower outgoings and a longer term can all increase what you can borrow. Because lenders differ, it is worth comparing, or using a broker, as the amount on offer can vary noticeably between them.
The role of your deposit
Your deposit affects not just your rate but sometimes how much you can borrow, since a bigger deposit lowers the loan-to-value and can open up more lenders and deals. The deposit and the borrowing together determine the price you can afford, as our guide to how much deposit you need explains. Working out both sides gives you a realistic budget for house-hunting.
The mortgage term
The length of your mortgage term affects your monthly payments and, indirectly, affordability. A longer term, such as 30 or 35 years rather than 25, lowers the monthly payment, which can help affordability and let you borrow a little more, though you pay more interest overall. Many first-time buyers choose longer terms to make the monthly cost manageable. It is a balance between affordability now and total cost over time.
Getting a realistic figure
The best way to get a realistic figure is to get a mortgage in principle, where a lender indicates how much they would lend based on your details, as our guide to the mortgage in principle explains. This is more accurate than a rough calculation and helps you house-hunt with confidence. A broker can also tell you which lenders are likely to offer you the most for your circumstances.
A worked example of borrowing
Suppose you and a partner jointly earn £55,000 and have a 10% deposit. At 4.5 times income, a lender might offer around £247,500, which with your deposit could buy a home of roughly £275,000, subject to affordability. If one of you had significant debts or high outgoings, the affordability assessment might reduce that. Seeing how income, deposit and affordability combine helps you set a realistic budget before you start viewing homes.
If your income varies
If you are self-employed, work on contracts, or have income that varies, lenders assess you differently, often looking at your average income over a period and asking for accounts or tax records. You can still get a good mortgage, but you may need more paperwork and the right lender. The way variable income is treated differs between lenders, so advice can be especially valuable if your earnings are not a simple fixed salary.
How debts reduce your borrowing
Existing debts and credit commitments reduce how much you can borrow, because they increase your outgoings in the affordability assessment. Loans, credit cards, car finance and other commitments all count. Reducing or clearing debts before you apply can increase the amount a lender will offer, sometimes substantially. So in the months before applying, paying down debt can do more for your borrowing power than a small pay rise would.
Why lenders offer different amounts
Different lenders can offer noticeably different amounts to the same person, because they use different income multiples, affordability rules and attitudes to particular circumstances. One lender might cap at 4.5 times income while another offers 5 or 5.5 times for your profile. This is why it is worth comparing, or using a broker who knows which lenders suit your situation, rather than assuming the first figure you are quoted is the most you can borrow.
Borrowing and the property
The property itself can affect how much you can borrow, because lenders assess whether it is suitable security for the loan. Unusual construction, flats above commercial premises, or properties with short leases can all affect lending. So the maximum you can borrow in principle assumes a standard, lendable property; an unusual one might be lent against more cautiously, which is worth bearing in mind when you choose where to buy.
Check before you house-hunt
Before you fall for a home, confirm your realistic borrowing with a mortgage in principle and factor in your deposit and the other costs of buying. This gives you a firm budget and avoids disappointment. Knowing what you can borrow, and pairing it with what you can comfortably afford each month rather than simply the maximum offered, is the foundation of a confident, sustainable first purchase.
Borrowing is only half the picture
Finally, remember that the maximum a lender will offer is not necessarily the amount you should borrow. Borrowing to your absolute limit leaves little room if your circumstances change or rates rise. Many first-time buyers deliberately borrow below their maximum so the monthly payments sit comfortably within their budget, leaving room to save and to cope with the unexpected. What you can borrow and what you should borrow are two different questions.
In short
A first-time buyer can usually borrow around 4 to 4.5 times their income, sometimes up to 5.5 times, but the final figure depends on an affordability assessment of your income against your outgoings, plus a stress test for higher rates. Your deposit, credit history, debts and the mortgage term all play a part. Buying jointly increases borrowing. Get a mortgage in principle for a realistic figure to house-hunt with.
Where to get help and next steps
Read our guides to how much deposit you need, the mortgage in principle, and first-time buyer mortgages explained. This is general information, not mortgage or financial advice.